measures of center

Measures of Center

Let's Review!

Match

Match the following terms with its correct definition.

• Mean or Average

• Median

• Mode

• Range

• What if there are 2 numbers in the middle?

The sum of all values divided by the total number of values

The middle value in a list of numbers when arranged in ascending order

The number that appears most frequently in a set of numbers

The difference between the highest and lowest values in a set of numbers

Add together, and divide by 2.

• The sum of all values divided by the total number of values
• The middle value in a list of numbers when arranged in ascending order
• The number that appears most frequently in a set of numbers
• The difference between the highest and lowest values in a set of numbers
• Add together, and divide by 2.

​Steps to find the MEAN

​1. Add all the numbers in the data set.

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​2. Count how many numbers you added.

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​3. Divide your sum by how many numbers there are. Your answer is the average or mean.

The term "average"

The term average is not used in statistics

The term mean should be used for the result obtained by adding all of the sample values and dividing by the total number of sample values.

Multiple Choice

What is the mean?

• The number that occurs the most
• The number in the middle
• The difference between the highest and lowest values
• The Average

add the term and definition^

Multiple Choice

To get the ______, add up all the numbers in a data set and divide by the amount of numbers in the data set.

• Median

• Mean

• Mode

• Range

Multiple Choice

Find the Mean of the Data Set:

7, 8, 3, 4, 8

• 7

• 6

• 5

• 4

Multiple Choice

Find the mean of the data set below:

6, 8, 5, 3, 8

• The mean is 6

• The mean is 30

• The mean is 5

Multiple Choice

1. Find the average (mean) of these numbers.
10, 3, 2, 5

• 5
• 4
• 10
• 3

The ​Median

​

Median

The median is the number in the "Middle"

Multiple Choice

What is the median?

• biggest- smallest

• average

• the middle number

• the number that happens the most

Multiple Choice

The median is the __________________ number (after you put them in order).

• first

• middle

• last

• one you see most

Multiple Choice

To get the ________, select the number that occurs the most in a data set (the most popular number).

• Mean

• Median

• Mode

• Range

Multiple Choice

In order to find the median, it's helpful to sort the numbers from least to greatest first.

• True

• False

Multiple Choice

A data set can have more than one median?

• True
• False

Multiple Choice

When finding the median, what do you do if there are two middle numbers?

• Find the difference between the 2 remaining numbers and divide by 2

• Write them both as the answer

• Give up

• Pick one

Multiple Choice

When finding the median what is the FIRST step?

• Mark off the lowest number
• Mark off the highest number
• Find the Middle
• Arrange the number from Least to Greatest

Multiple Choice

To get the _______,

1. Order the numbers in the data set from smallest to largest

2. Find the middle number in the data set.

• Mean

• Median

• Mode

• Range

Multiple Choice

Find the median of this set of numbers

6,0,5,3,7,1,5,9

• 5

• 10

• 7

• 1

The Mode

​

MODE

a.k.a. The Most Popular Number

Multiple Choice

To get the ________, select the number that occurs the most in a data set aka the most popular number.

• Mean

• Median

• Mode

• Range

Multiple Choice

What is the MODE of this data?

• 90
• 85, 90, and 95
• 85 and 95
• None

Multiple Choice

How do you find the mode in a data set?

• To find the mode, identify the number that appears most frequently.

• The mode is the average of all numbers in the data set.

• The mode is the middle value when the data set is ordered.

• The mode is the sum of all numbers divided by the count of numbers.

RANGE

Subtract the lowest number from the highest number.

Range

To calculate range, subtract the largest number and smallest number in the data set.

Example: Find the range: 4, 8, 5, 7, 6​, 4, 9

Largest (9)​ and Smallest (4). 9 - 4 = 5

So the range is 5.​​

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Subject | Subject

Some text here about the topic of discussion

Multiple Choice

To get the ________, subtract the smallest number in the data set from the biggest number in the data set.

• Mean

• Median

• Mode

• Range

Multiple Choice

What is the range?

• 6

• 2 - 8

• 3

• 4

Match

Match the following terms with its correct definition.

• Mean or Average

• Median

• Mode

• Range

• What if there are 2 numbers in the middle?

The sum of all values divided by the total number of values

The middle value in a list of numbers when arranged in ascending order

The number that appears most frequently in a set of numbers

The difference between the highest and lowest values in a set of numbers

Add together, and divide by 2.

• The sum of all values divided by the total number of values
• The middle value in a list of numbers when arranged in ascending order
• The number that appears most frequently in a set of numbers
• The difference between the highest and lowest values in a set of numbers
• Add together, and divide by 2.

Multiple Choice

What is the range of Susie's Test Scores?

• 40

• 30

• 15

• 25

Multiple Choice

What is the range of this data set?

• 20
• 5
• 30
• 26

Multiple Choice

What is the range?

• average
• biggest-smallest
• the middle #
• # happening the most

Multiple Choice

The range is found by finding the _______________ number and subtracting the ________________ number.

• smallest, biggest

• even, odd

• biggest, smallest

• middle, first

Multiple Choice

Identify the outlier for the given data?

23, 34, 27, 7, 30, 26, 28, 31, 34

• 7

• 23

• 31

• 34